Denis Wang wangyingang

#SSH Login without password

Create public and private keys using ssh-keygen on local-host
```
$ ssh-keygen
```

or

# Creates a new ssh key, using the provided email as a label
$ ssh-keygen -t rsa -C "your_email@example.com"

Remove All Unused Linux Kernel Headers, Images and Modules

list all installed kernels

dpkg --list | grep linux-image

clean up

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

if you’ve upgraded your system, or had an update with a new kernel, please reboot your machine before running above the command

Command and arguments reuse

1.^r in bash begins a reverse-search-history with command completion

Press ctrl+r in a bash shell and type a few letters of a previous command

I can't imagine how much typing this has saved me.

2.history and !number

Docker Cheat Sheet

Why

Why Should I Care (For Developers)

"Docker interests me because it allows simple environment isolation and repeatability. I can create a run-time environment once, package it up, then run it again on any other machine. Furthermore, everything that runs in that environment is isolated from the underlying host (much like a virtual machine). And best of all, everything is fast and simple."

TL;DR, I just want a dev environment

Introduction

An introduction to curl using GitHub's API

The Basics

Makes a basic GET request to the specifed URI

curl https://api.github.com/users/caspyin

package info.wangyg.algorithms.sort;

import java.lang.reflect.Array;
import java.util.Comparator;

/**
 * 
 * @author wangyingang
 *

	# Install MacTex: http://mirror.ctan.org/systems/mac/mactex/mactex-basic.pkg

	$ sudo chown -R `whoami` /usr/local/texlive
	$ tlmgr update --self
	$ tlmgr install ucs
	$ tlmgr install etoolbox

	# Install pandoc view homebrew
	$ brew install haskell-platform
	$ cabal install pandoc

	# Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key
	# that enables you to choose a character from a menu of options. If you are on Lion
	# try it by pressing and holding down 'e' in any app that uses the default NSTextField
	# for input.
	#
	# It's a nice feature and continues the blending of Mac OS X and iOS features. However,
	# it's a nightmare to deal with in Sublime Text 2 if you're running Vintage (Vim) mode,
	# as it means you cannot press and hold h/j/k/l to move through your file. You have
	# to repeatedly press the keys to navigate.

	<?xml version="1.0"?>
	<root>
	<!--
	<item>
	<name>Use caps lock key to extra modifier</name>
	<appendix>(You need to change the key code of caps lock to 80 on PCKeyboardHack)</appendix>
	<identifier>private.capslock_extra_modifier</identifier>
	<block>
	<modifier_only>ModifierFlag::CAPSLOCK</modifier_only>
	<autogen>

	package yourpackage;

	import static org.mockito.Mockito.*;

	import java.util.HashMap;

	import org.hibernate.SessionFactory;
	import org.hibernate.classic.Session;
	import org.hibernate.dialect.MySQL5Dialect;
	import org.hibernate.dialect.function.SQLFunctionRegistry;